Preparation and application of high-stability cuprous modified molecular sieve material

A high-stability, molecular sieve technology, used in the refining of hydrocarbon oil, separation methods, and dispersed particle separation, can solve the problems of loss of adsorption activity, loss of π complexation force, poor stability, etc. Stability, the effect of improving moisture resistance

Pending Publication Date: 2019-10-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Cu(I) modified molecular sieve materials have an application defect, that is, Cu(I) has poor stability, which limits its practical application.
Even in a normal environment, the Cu(I) active sites in Cu(I) modified molecular sieve materials are extremely unstable, which seriously affects the preparation, storage and application of Cu(I) modified molecular sieve materials. (I) is easily oxidized to Cu(II) under the combined action of water vapor and air, loses π complexation force, and loses adsorption activity

Method used

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  • Preparation and application of high-stability cuprous modified molecular sieve material
  • Preparation and application of high-stability cuprous modified molecular sieve material
  • Preparation and application of high-stability cuprous modified molecular sieve material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 0.1g of Cu(I)Y powder and lay it flat in a glass bottle, put 0.1g of polydimethylsiloxane around it to ensure that the two do not touch, seal it and vacuumize it, put it in 215°C for 30min, and let it cool down to room temperature naturally , the highly stable monovalent copper modified molecular sieve adsorbent can be obtained, the polydimethylsiloxane coating amount is 3.1wt%, the contact angle is 154° after testing, and it has superhydrophobicity.

[0029] In the experiment, it was ensured that the Cu(I)Y powder was not in contact with polydimethylsiloxane. Under high temperature and vacuum conditions, polydimethylsiloxane was vapor-deposited on the surface of molecular sieves to form a uniform hydrophobic coating; if two If the polydimethylsiloxane does not become gas-phase deposited on the surface of the molecular sieve, but is physically mixed, the amount of polydimethylsiloxane will increase, which will instead block the molecular sieve due to too much amoun...

Embodiment 2

[0035] According to Table 2, the monovalent copper modified molecular sieve is dispersed in the solvent to make a suspension, and then the hydrophobic coating is also dispersed in the solvent. After the two are mixed, they are spray-dried in an inert gas, and the collected samples are washed with a solvent and dried in vacuum at 120°C to obtain a highly stable monovalent copper-modified molecular sieve adsorbent.

[0036] Table 2

[0037]

[0038]

[0039] The mass concentration ratio of the monovalent copper modified molecular sieve to the hydrophobic coating determines the mass content of the hydrophobic coating coated on the surface of the material. When the mass concentration ratio is too large, the adsorbent is still a hydrophilic material. If the mass concentration ratio is too small, an excessive amount of hydrophobic coating will be introduced to block the pores, which will seriously affect the adsorption performance. As can be seen from the experimental data in...

Embodiment 3

[0041] According to Table 3, take monovalent copper modified molecular sieve, monomer and initiator, add solvent, seal reaction at a certain temperature, and naturally cool to room temperature to prepare highly stable monovalent copper modified molecular sieve adsorbent.

[0042] table 3

[0043]

[0044]

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Abstract

The invention discloses preparation and application of a high-stability cuprous modified molecular sieve material. The high-stability cuprous modified molecular sieve material is involved and comprises a hydrophobic coating and a cuprous modified molecular sieve; the mass ratio of the hydrophobic coating to the cuprous modified molecular sieve is (0.02-0.3):1. The preparation method of the high-stability cuprous modified molecular sieve material is further involved. The method comprises the step that the surface of the cuprous modified molecular sieve is coated with the hydrophobic coating. The stability and humidity resistance of the high-stability cuprous modified molecular sieve material are high, and the high-stability cuprous modified molecular sieve material can be applied to desulfuration of fuel oil, separation of olefin and alkane and recycling of carbon monoxide.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to the preparation and application of highly stable monovalent copper modified molecular sieve materials. Background technique [0002] Mercaptans, sulfides, sulfur oxides, and thiophene sulfides in fuel oil (gasoline, diesel, kerosene, etc.) generate toxic sulfur oxides with the combustion of fuel oil, pollute the air, and generate acid rain, which is extremely harmful. Therefore Deep desulfurization of fuel oil has become an important and urgent problem to be solved. Olefins and alkanes are important raw materials in chemical production, but at present, the separation of alkenes and alkanes usually adopts low-temperature rectification method with high energy density and large investment in equipment. Carbon monoxide is one of the most important raw materials in the chemical industry. However, the carbon monoxide raw materials that can be obtained from stea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30C10G25/05B01D53/02
CPCB01J20/0237B01J20/186C10G25/05B01D53/02B01D2257/702B01D2257/502
Inventor 刘晓勤李玉霞孙林兵
Owner NANJING UNIV OF TECH
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